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Exhibit 99.1

For Immediate Release

ORIGIN BANCORP, INC. REPORTS EARNINGS FOR SECOND QUARTER 2025

RUSTON, Louisiana (July 23, 2025) - Origin Bancorp, Inc. (NYSE: OBK) (“Origin,” “we,” “our” or the “Company”), the holding company for Origin Bank (the “Bank”), today announced net income of $14.6 million, or $0.47 diluted earnings per share (“EPS”) for the quarter ended June 30, 2025, compared to net income of $22.4 million, or $0.71 diluted earnings per share, for the quarter ended March 31, 2025. Pre-tax, pre-provision (“PTPP”)(1) earnings were $21.5 million for the quarter ended June 30, 2025, compared to $32.0 million for the linked quarter.

“During the second quarter, we continued to successfully execute on Optimize Origin, our plan to deliver elite level financial performance for Origin and our shareholders,” said Drake Mills, chairman, president and CEO of Origin Bancorp, Inc. “Throughout the first half of the year, we have created efficiencies within our branch network, improved the overall profitability of our commercial banking team, restructured our mortgage business, and taken multiple actions to optimize our balance sheet. As we head into the back half of 2025, we are well-positioned in the nation’s most dynamic growth markets; and I have full confidence that our employees will continue delivering exceptional value to our customers, communities, and shareholders.”

(1) PTPP earnings is a non-GAAP financial measure, please see the last few pages of this document for a reconciliation of this alternative financial measure to its most directly comparable GAAP measure.

Optimize Origin

•In January 2025, we announced our initiative to drive elite financial performance and enhance our award-winning culture.

•Built on three primary pillars:

◦Productivity, Delivery & Efficiency

◦Balance Sheet Optimization

◦Culture & Employee Engagement

•Established near term target of greater than a 1% ROAA run rate by 4Q25 and an ultimate target of top quartile ROAA.

•Near term target is being achieved in part by branch consolidation, headcount reduction, securities optimization, capital optimization, cash/liquidity management, mortgage restructuring, as well as other opportunistic efficiency optimizations throughout the organization.

•We believe the actions we have taken will drive earnings improvement of approximately $34.2 million annually on a pre-tax pre-provision basis - an increase of approximately $10.8 million since the last quarterly update, due to additional benefits from increasing our Argent Financial ownership and further securities portfolio optimization.

Financial Highlights

•Net interest income was $82.1 million for the quarter ended June 30, 2025, reflecting an increase of $3.7 million, or 4.7%, compared to the linked quarter and is at its highest level in the previous nine quarters.

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•Our fully tax equivalent net interest margin (“NIM-FTE”) expanded 17 basis points to 3.61% for the quarter ended June 30, 2025, compared to the quarter ended March 31, 2025. The increase was primarily driven by an eight-basis point increase in the yield earned on average interest-earning assets and a five-basis point decline in the rate paid on average interest-bearing liabilities.

•As part of our bond portfolio optimization strategy, we sold available-for-sale investment securities with a book value of $215.8 million and realized a loss of $14.4 million during the quarter ended June 30, 2025. This transaction, net of the increase in interest income, negatively impacted diluted EPS by $0.35, but contributed approximately two basis points to our NIM-FTE for the quarter ended June 30, 2025, with an estimated twelve-month total positive impact to NIM-FTE of six basis points.

•Total loans held for investment (“LHFI”) were $7.68 billion at June 30, 2025, reflecting an increase of $98.9 million, or 1.3%, compared to March 31, 2025. LHFI, excluding mortgage warehouse lines of credit (“MW LOC”), were $7.11 billion at June 30, 2025, reflecting a decrease of $71.7 million, or 1.0%, compared to March 31, 2025.

•During the quarter ended June 30, 2025, we repurchased 136,399 shares of our common stock at an average price of $31.84 per share. Also, in July 2025, our board of directors approved a stock repurchase program authorizing the purchase of up to $50.0 million of the Company’s outstanding common stock over the next three years, replacing the existing plan which expires this month.

•Book value per common share was $38.62 at June 30, 2025, reflecting an increase of $0.85, or 2.3%, compared to March 31, 2025 and $3.39, or 9.6%, compared to June 30, 2024. Tangible book value per common share(1) was $33.33 at June 30, 2025, reflecting an increase of $0.90, or 2.8%, compared to March 31, 2025 and $3.56, or 12.0%, compared to June 30, 2024.

•As part of our Optimize Origin initiatives, we purchased additional shares of Argent Financial on July 1, 2025, which allowed us to reach the 20% ownership threshold. This will change our accounting methodology on this investment to the equity method, which will result in an increase in noninterest income.

(1) Tangible book value per common share is a non-GAAP financial measure, please see the last few pages of this document for a reconciliation of this alternative financial measure to its most directly comparable GAAP measure.

Results of Operations for the Quarter Ended June 30, 2025

Net Interest Income and Net Interest Margin

Net interest income for the quarter ended June 30, 2025, was $82.1 million, an increase of $3.7 million, or 4.7%, compared to the quarter ended March 31, 2025. The increase was primarily driven by a $4.1 million increase in interest income earned on LHFI and decreases of $1.6 million and $1.1 million in interest expense paid on interest-bearing deposits and subordinated debentures, respectively, partially offset by a $3.0 million decrease in interest income earned on interest-earning balances due from banks and a $1.1 million increase in interest expense on FHLB advances and other borrowings.

The increase in average LHFI principal balances and the impact of one more calendar day during the quarter ended June 30, 2025, resulted in interest income increases of $3.1 million and $1.3 million, respectively, when compared to the quarter ended March 31, 2025. The increase in average LHFI principal balances was primarily driven by increases of $191.1 million and $64.1 million in MW LOC and commercial and industrial loans, respectively, partially offset by a decrease of $77.1 million in total average real estate loan balances.

The $1.6 million decrease in interest expense on interest-bearing deposits was mainly due to a $232.8 million decrease in average interest-bearing deposits balance, during the quarter ended June 30, 2025, when compared to the quarter ended March 31, 2025. Due primarily to the seasonality of the deposits, interest-bearing public fund average deposit balances decreased $163.5 million during the quarter ended June 30, 2025.

The $1.1 million decrease in interest expense on subordinated debentures was primarily driven by the redemption of $70.0 million in subordinated debentures during the quarter ended March 31, 2025, in conjunction with our Optimize Origin initiatives.

The $3.0 million decrease in interest income earned on average interest-earning balances due from banks was primarily driven by a $267.4 million decrease in average interest-earning balances due from banks.

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The $97.8 million increase in average FHLB advances and other borrowings balance contributed $664,000 to the total $1.1 million increase in interest expense on FHLB advances and other borrowings during the quarter ended June 30, 2025. The remaining increase was primarily driven by an increase in the average rate paid on FHLB advances and other borrowings rising to 4.36% for the quarter ended June 30, 2025, from 2.75% for the quarter ended March 31, 2025. The average short-term FHLB balances were $98.4 million for the quarter ended June 30, 2025, compared to zero for the quarter ended March 31, 2025.

The Federal Reserve Board sets various benchmark rates, including the federal funds rate, and thereby influences the general market rates of interest, including the loan and deposit rates offered by financial institutions. On September 18, 2024, the Federal Reserve reduced the federal funds target rate range by 50 basis points, to a range of 4.75% to 5.00%, marking the first rate reduction since early 2020. Subsequently, it implemented two additional reductions, with the current federal funds target range set to 4.25% to 4.50% on December 18, 2024. In total, the federal funds target range has decreased 100 basis points from its recent cycle high.

Our NIM-FTE was 3.61% for the quarter ended June 30, 2025, representing 17- and 44-basis-point increases compared to the linked quarter and the quarter ended June 30, 2024, respectively. The yield earned on interest-earning assets for the quarter ended June 30, 2025, was 5.87%, an increase of eight basis points compared to the linked quarter and a decrease of 17 basis points compared to the quarter ended June 30, 2024. The average rate paid on total interest-bearing liabilities for the quarter ended June 30, 2025, was 3.25%, representing a decrease of five- and 73-basis points compared to the linked quarter and the quarter ended June 30, 2024, respectively. Additionally, total loans represented 83.6% of average interest-earning assets during the quarter ended June 30, 2025, up from 80.8% during the quarter ended March 31, 2025, providing a favorable shift in the asset mix that contributed to the margin improvement.

During the quarter ended June 30, 2025, we executed a bond portfolio optimization strategy aimed at enhancing long-term yields and improving overall portfolio performance. This strategy involved selling lower-yielding available-for-sale investment securities and using the proceeds to purchase higher-yielding available-for-sale investment securities. As a result, we replaced securities with a total book value of $215.8 million and a weighted average yield of 2.60% with new securities totaling $201.8 million with a weighted average yield of 5.23%, realizing a loss of $14.4 million. The weighted average duration of the securities portfolio increased to 4.52 years as of June 30, 2025, compared to 4.10 years as of March 31, 2025. As part of the strategy, we also entered into interest rate swaps designated as fair value hedges on seven of these purchased securities with a total book value of $41.3 million, to help reduce potential volatility in the fair value of these securities due to changes in market rates. While this transaction resulted in a $0.35 negative impact to diluted EPS during the quarter ended June 30, 2025, due to the realized loss net of the increase in interest income, we believe the trade-off in yield represents an attractive opportunity. This transaction is expected to generate an estimated annual increase in net interest income of $5.6 million, with an estimated earn-back period of 2.6 years and an estimated twelve-month total positive impact to NIM-FTE of six basis points. We will continue to evaluate and identify any additional opportunities that may present themselves to maximize our return on our securities portfolio.

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Credit Quality

The table below includes key credit quality information:

	At and For the Three Months Ended									Change			% Change
(Dollars in thousands, unaudited)	June 30,  2025			March 31,  2025			June 30,  2024			Linked  Quarter			Linked  Quarter
Past due LHFI(1)	$	67,626		$	72,774		$	66,276		$	(5,148)		7.1	%
Past due 30 to 89 days and still accruing	12,495			42,587			17,080			(30,092)			70.7
Allowance for loan credit losses (“ALCL”)	92,426			92,011			100,865			415			0.5
Classified loans	127,637			127,676			118,254			(39)			—
Total nonperforming LHFI	85,315			81,368			75,812			3,947			4.9
Provision for credit losses	2,862			3,444			5,231			(582)			16.9
Net charge-offs	2,300			2,728			2,946			(428)			15.7
Credit quality ratios(2):
ALCL to nonperforming LHFI	108.33		%	113.08		%	133.05		%	(4.75)		%	N/A
ALCL to total LHFI	1.20			1.21			1.27			(0.01)			N/A
ALCL to total LHFI, adjusted(3)	1.29			1.28			1.34			0.01			N/A
Classified loans to total LHFI	1.66			1.68			1.49			(0.02)			N/A
Nonperforming LHFI to LHFI	1.11			1.07			0.95			0.04			N/A
Net charge-offs to total average LHFI (annualized)	0.12			0.15			0.15			(0.03)			N/A

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N/A = Not applicable.

(1)Past due LHFI are defined as loans 30 days or more past due and includes past due nonperforming loans.

(2)Please see the Loan Data schedule at the back of this document for additional information.

(3)The ALCL to total LHFI, adjusted, is calculated by excluding the ALCL for MW LOC loans from the total LHFI ALCL in the numerator and excluding the MW LOC loans from the LHFI in the denominator. Due to their low-risk profile, MW LOC loans require a disproportionately low allocation of the ALCL.

Loans past due 30-89 days and still accruing decreased $30.1 million for the current quarter compared to the linked quarter. The decrease was primarily driven by three loan relationships totaling $10.7 million that were paid off in the current quarter. Also contributing to the decrease in loans 30-89 days past due and still accruing were three loan relationships that are now over 90 days past due and nonperforming totaling $10.6 million and two loan relationships that are now no longer past due totaling $3.0 million.

Nonperforming LHFI increased $3.9 million for the current quarter compared to the linked quarter, evidenced by an increase in the percentage of nonperforming LHFI to LHFI to 1.11% compared to 1.07% for the linked quarter. The increase in nonperforming loans was primarily driven by four relationships totaling $12.9 million at June 30, 2025. The increase was partially offset by $3.6 million in payments from two relationships and further reduced by total charge-offs of $2.9 million.

Our results included a credit loss provision expense of $2.9 million during the quarter ended June 30, 2025, which includes a $2.7 million provision for loan credit losses, compared to provision for loan credit losses of $3.7 million for the linked quarter. Net charge-offs decreased $428,000 for the quarter ended June 30, 2025, when compared to the quarter ended March 31, 2025, primarily due to total charge-offs of $4.8 million in the linked quarter, consisting primarily of two commercial and industrial loan relationships with charge-offs totaling $2.6 million, with no comparably sized charge-offs during the current quarter.

Noninterest Income

Noninterest income for the quarter ended June 30, 2025, was $1.4 million, a decrease of $14.2 million, or 91.2%, from the linked quarter, primarily driven by a $14.4 million loss on sales of securities, net, and a $1.3 million decrease in insurance commission and fee income, respectively, in the current quarter. These decreases were partially offset by an increase of $902,000 in swap fee income.

The loss on sales of securities, net, during the current quarter was due to the execution of the bond portfolio optimization strategy discussed above.

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The decrease in insurance commission and fee income was primarily driven by a seasonal increase in annual contingency fee income recognized in the first quarter with no comparable increase in the current quarter.

The increase in swap fee income was due to both an attractive interest rate environment which is increasingly conducive to facilitating back-to-back swaps for our customers and an increased focus on the marketing of customer swaps as part of Optimize Origin.

Noninterest Expense

Noninterest expense for the quarter ended June 30, 2025, was $62.0 million, a decrease of $85,000, or 0.1% from the linked quarter. The decrease was primarily driven by a decrease of $1.4 million in occupancy and equipment, net, that was partially offset by increases of $549,000 and $475,000 in salaries and employee benefit expense and data processing expense, respectively.

The $1.4 million decrease in occupancy and equipment, net was primarily due to cost incurred in the linked quarter in connection with the closure of banking centers as a part of Optimize Origin.

The $549,000 increase in salaries and employee benefit expense was primarily due to the adjustment of the incentive compensation accrual which drove the salaries and employee benefit expense lower during the linked quarter.

The $475,000 increase in data processing expense was primarily due to higher loan workflow software costs during the current quarter compared to the linked quarter.

Financial Condition

Loans

•Total LHFI at June 30, 2025, were $7.68 billion, an increase of $98.9 million, or 1.3%, from $7.59 billion at March 31, 2025, and a decrease of $274.7 million, or 3.5%, compared to June 30, 2024.

•The primary drivers of the increase during the quarter ended June 30, 2025, compared to the linked quarter, were increases in MW LOC, multi-family real estate and owner occupied commercial real estate of $170.6 million, $40.1 million and $34.8 million, respectively. These increases were partially offset by decreases of $144.9 million and $10.9 million in construction/land/land development loans and commercial and industrial loans, respectively.

Securities

•Total securities at June 30, 2025 were $1.14 billion, a decrease of $34.9 million, or 3.0%, from $1.18 billion at March 31, 2025, and a decrease of $34.1 million, or 2.9%, compared to June 30, 2024.

•The decrease in securities was primarily due to maturities of short-term investments and net sales of available for sale securities during the current quarter.

•In connection with Optimize Origin, we made a strategic decision to replace lower yielding available-for-sale securities with a total book value of $215.8 million with higher-yielding securities totaling $201.8 million. Additional details about this transaction is disclosed above in the Net Interest Income and Net Interest Margin section of this release.

•Accumulated other comprehensive loss, net of taxes, primarily associated with unrealized losses within the available for sale portfolio, was $73.6 million at June 30, 2025, a decrease of $16.9 million, or 18.6%, from the linked quarter.

•The weighted average effective duration for the total securities portfolio was 4.52 years as of June 30, 2025, compared to 4.10 years as of March 31, 2025.

Deposits

•Total deposits at June 30, 2025, were $8.12 billion, a decrease of $215.4 million, or 2.6%, compared to March 31, 2025, and a decrease of $387.8 million, or 4.6%, from June 30, 2024. Seasonality in our public fund deposits drove $99.7 million of the current quarter decline when compared to March 31, 2025.

•The decrease in total deposits at June 30, 2025, compared to the linked quarter was primarily due to decreases of $159.0 million, $57.3 million and $47.1 million in interest-bearing demand deposits, time deposits (excluding brokered time deposits) and noninterest-bearing deposits, respectively. The decrease was partially offset by an increase of $92.6 million in money market deposits.

•At June 30, 2025 and March 31, 2025, noninterest-bearing deposits as a percentage of total deposits were 22.7%. At June 30, 2024, noninterest-bearing deposits as a percentage of total deposits were 21.9%.

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Borrowings

•FHLB advances and other borrowings at June 30, 2025, were $127.8 million, an increase of $115.4 million from $12.5 million at March 31, 2025, and an increase of $87.1 million compared to June 30, 2024. The increase in the current quarter compared to the linked quarter is primarily due to an increase in FHLB short-term borrowings of $115.0 million used primarily to meet current liquidity needs.

•Average FHLB advances were $104.5 million for the quarter ended June 30, 2025, an increase of $98.3 million from $6.2 million for the quarter ended March 31, 2025 and an increase of $68.8 million from June 30, 2024.

Conference Call

Origin will hold a conference call to discuss its second quarter 2025 results on Thursday, July 24, 2025, at 8:00 a.m. Central Time (9:00 a.m. Eastern Time). To participate in the live conference call, please dial +1 (929) 272-1574 (U.S. Local / International 1); +1 (857) 999-3259 (U.S. Local / International 2); +1 (888) 700-7550 (U.S. Toll Free), enter Conference ID: 05905 and request to be joined into the Origin Bancorp, Inc. (OBK) call. A simultaneous audio-only webcast may be accessed via Origin’s website at www.origin.bank under the investor relations, News & Events, Events & Presentations link or directly by visiting https://dealroadshow.com/e/ORIGINQ2.

If you are unable to participate during the live webcast, the webcast will be archived on the Investor Relations section of Origin’s website at www.origin.bank, under Investor Relations, News & Events, Events & Presentations.

About Origin

Origin Bancorp, Inc. is a financial holding company headquartered in Ruston, Louisiana. Origin’s wholly owned bank subsidiary, Origin Bank, was founded in 1912 in Choudrant, Louisiana. Deeply rooted in Origin’s history is a culture committed to providing personalized relationship banking to businesses, municipalities, and personal clients to enrich the lives of the people in the communities it serves. Origin provides a broad range of financial services and currently operates more than 55locations in Dallas/Fort Worth, East Texas, Houston, North Louisiana, Mississippi, South Alabama and the Florida Panhandle. For more information, visit www.origin.bank.

Non-GAAP Financial Measures

Origin reports its results in accordance with generally accepted accounting principles in the United States of America ("GAAP"). However, management believes that certain supplemental non-GAAP financial measures may provide meaningful information to investors that is useful in understanding Origin's results of operations and underlying trends in its business. However, non-GAAP financial measures are supplemental and should be viewed in addition to, and not as an alternative for, Origin's reported results prepared in accordance with GAAP. The following are the non-GAAP measures used in this release: PTPP earnings, PTPP ROAA, tangible book value per common share, ROATCE, and core efficiency ratio.

Please see the last few pages of this release for reconciliations of non-GAAP measures to the most directly comparable financial measures calculated in accordance with GAAP.

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Forward-Looking Statements

This press release contains certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements include information regarding Origin Bancorp, Inc’s (“Origin”, “we”, “our” or the “Company”) future financial performance, business and growth strategies, projected plans and objectives, and any expected purchases of its outstanding common stock, and related transactions and other projections based on macroeconomic and industry trends, including changes to interest rates by the Federal Reserve and the resulting impact on Origin’s results of operations, estimated forbearance amounts and expectations regarding the Company’s liquidity, including in connection with advances obtained from the FHLB, which are all subject to change and may be inherently unreliable due to the multiple factors that impact broader economic and industry trends, and any such changes may be material. Such forward-looking statements are based on various facts and derived utilizing important assumptions and current expectations, estimates and projections about Origin and its subsidiaries, any of which may change over time and some of which may be beyond Origin’s control. Statements or statistics preceded by, followed by or that otherwise include the words “assumes,” “anticipates,” “believes,” “estimates,” “expects,” “foresees,” “intends,” “plans,” “projects,” and similar expressions or future or conditional verbs such as “could,” “may,” “might,” “should,” “will,” and “would” and variations of such terms are generally forward-looking in nature and not historical facts, although not all forward-looking statements include the foregoing words. Further, certain factors that could affect Origin’s future results and cause actual results to differ materially from those expressed in the forward-looking statements include, but are not limited to: (1) the impact of current and future economic conditions generally and in the financial services industry, nationally and within Origin’s primary market areas, including the impact of tariffs, as well as the financial stress on borrowers and changes to customer and client behavior as a result of the foregoing; (2) changes in benchmark interest rates and the resulting impacts on net interest income; (3) deterioration of Origin’s asset quality; (4) factors that can impact the performance of Origin’s loan portfolio, including real estate values and liquidity in Origin’s primary market areas; (5) the financial health of Origin’s commercial borrowers and the success of construction projects that Origin finances; (6) changes in the value of collateral securing Origin’s loans; (7) the impact of generative artificial intelligence; (8) Origin’s ability to anticipate interest rate changes and manage interest rate risk; (9) the impact of heightened regulatory requirements, reduced debit interchange and overdraft income and the possibility of facing related adverse business consequences if our total assets grow in excess of $10 billion as of December 31 of any calendar year; (10) the effectiveness of Origin’s risk management framework and quantitative models; (11) Origin’s inability to receive dividends from Origin Bank and to service debt, pay dividends to Origin’s common stockholders, repurchase Origin’s shares of common stock and satisfy obligations as they become due; (12) the impact of labor pressures; (13) changes in Origin’s operation or expansion strategy or Origin’s ability to prudently manage its growth and execute its strategy; (14) changes in management personnel; (15) Origin’s ability to maintain important customer relationships, reputation or otherwise avoid liquidity risks; (16) increasing costs as Origin grows deposits; (17) operational risks associated with Origin’s business; (18) significant turbulence or a disruption in the capital or financial markets and the effect of market disruption and interest rate volatility on our investment securities; (19) increased competition in the financial services industry, particularly from regional and national institutions, as well as from fintech companies; (20) compliance with governmental and regulatory requirements and changes in laws, rules, regulations, interpretations or policies relating to financial institutions; (21) periodic changes to the extensive body of accounting rules and best practices; (22) further government intervention in the U.S. financial system; (23) a deterioration of the credit rating for U.S. long-term sovereign debt; (24) Origin’s ability to comply with applicable capital and liquidity requirements, including its ability to generate liquidity internally or raise capital on favorable terms, including continued access to the debt and equity capital markets; (25) natural disasters and other adverse weather events, pandemics, acts of terrorism, war, and other matters beyond Origin’s control; (26) developments in our mortgage banking business, including loan modifications, general demand, and the effects of judicial or regulatory requirements or guidance; (27) fraud or misconduct by internal or external actors (including Origin employees); (28) cybersecurity threats or security breaches and the cost of defending against them; (29) Origin’s ability to maintain adequate internal controls over financial and non-financial reporting; and (30) potential claims, damages, penalties, fines, costs and reputational damage resulting from pending or future litigation, regulatory proceedings and enforcement actions. For a discussion of these and other risks that may cause actual results to differ from expectations, please refer to the sections titled “Cautionary Note Regarding Forward-Looking Statements” and “Risk Factors” in Origin’s most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission and any updates to those sections set forth in Origin’s subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K. If one or more events related to these or other risks or uncertainties materialize, or if Origin’s underlying assumptions prove to be incorrect, actual results may differ materially from what Origin anticipates. Accordingly, you should not place undue reliance on any forward-looking statements. Any forward-looking statement speaks only as of the date on which it is made, and Origin does not undertake any obligation to publicly update or review any forward-looking statement, whether as a result of new information, future developments or otherwise.

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New risks and uncertainties arise from time to time, and it is not possible for Origin to predict those events or how they may affect Origin. In addition, Origin cannot assess the impact of each factor on Origin’s business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. All forward-looking statements, expressed or implied, included in this communication are expressly qualified in their entirety by this cautionary statement. This cautionary statement should also be considered in connection with any subsequent written or oral forward-looking statements that Origin or persons acting on Origin’s behalf may issue. Annualized, pro forma, adjusted, projected, and estimated numbers are used for illustrative purposes only, are not forecasts, and may not reflect actual results.

This press release contains projected financial information with respect to Origin, including with respect to certain goals and strategic initiatives of Origin and the anticipated benefits thereof. This projected financial information constitutes forward-looking information and is for illustrative purposes only and should not be relied upon as necessarily being indicative of future results. The assumptions and estimates underlying such projected financial information are inherently uncertain and are subject to significant business, economic (including interest rate), competitive, and other risks and uncertainties. Actual results may differ materially from the results contemplated by the projected financial information contained herein and the inclusion of such projected financial information in this release should not be regarded as a representation by any person that such actions will be taken or accomplished or that the results reflected in such projected financial information with respect thereto will be achieved.

Contact:

Investor Relations

Chris Reigelman

318-497-3177

chris@origin.bank

Media Contact

Ryan Kilpatrick

318-232-7472

rkilpatrick@origin.bank

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Origin Bancorp, Inc.

Selected Quarterly Financial Data

(Unaudited)

	Three Months Ended
	June 30,  2025			March 31,  2025			December 31,  2024			September 30,  2024			June 30,  2024
Income statement and share amounts	(Dollars in thousands, except per share amounts)
Net interest income	$	82,136		$	78,459		$	78,349		$	74,804		$	73,890
Provision (benefit) for credit losses	2,862			3,444			(5,398)			4,603			5,231
Noninterest income (loss)	1,368			15,602			(330)			15,989			22,465
Noninterest expense	61,983			62,068			65,422			62,521			64,388
Income before income tax expense	18,659			28,549			17,995			23,669			26,736
Income tax expense	4,012			6,138			3,725			5,068			5,747
Net income	$	14,647		$	22,411		$	14,270		$	18,601		$	20,989
PTPP earnings(1)	$	21,521		$	31,993		$	12,597		$	28,272		$	31,967
Basic earnings per common share	0.47			0.72			0.46			0.60			0.68
Diluted earnings per common share	0.47			0.71			0.46			0.60			0.67
Dividends declared per common share	0.15			0.15			0.15			0.15			0.15
Weighted average common shares outstanding - basic	31,192,622			31,205,752			31,155,486			31,130,293			31,042,527
Weighted average common shares outstanding - diluted	31,327,818			31,412,010			31,308,805			31,239,877			31,131,829
Balance sheet data
Total LHFI	$	7,684,446		$	7,585,526		$	7,573,713		$	7,956,790		$	7,959,171
Total LHFI excluding MW LOC	7,109,698			7,181,395			7,224,632			7,461,602			7,452,666
Total assets	9,678,158			9,750,372			9,678,702			9,965,986			9,947,182
Total deposits	8,123,036			8,338,412			8,223,120			8,486,568			8,510,842
Total stockholders’ equity	1,205,769			1,180,177			1,145,245			1,145,673			1,095,894
Performance metrics and capital ratios
Yield on LHFI	6.33		%	6.33		%	6.47		%	6.67		%	6.58		%
Yield on interest-earnings assets	5.87			5.79			5.91			6.09			6.04
Cost of interest-bearing deposits	3.20			3.23			3.61			4.01			3.95
Cost of total deposits	2.47			2.52			2.79			3.14			3.08
NIM - fully tax equivalent ("FTE")	3.61			3.44			3.33			3.18			3.17
Return on average assets (annualized) ("ROAA")	0.60			0.93			0.57			0.74			0.84
PTPP ROAA (annualized)(1)	0.89			1.32			0.50			1.13			1.28
Return on average stockholders’ equity (annualized) ("ROAE")	4.94			7.79			4.94			6.57			7.79
Return on average tangible common equity (annualized) ("ROATCE")(1)	5.74			9.09			5.78			7.74			9.25
Book value per common share	$	38.62		$	37.77		$	36.71		$	36.76		$	35.23
Tangible book value per common share (1)	33.33			32.43			31.38			31.37			29.77
Efficiency ratio(2)	74.23		%	65.99		%	83.85		%	68.86		%	66.82		%
Core efficiency ratio(1)	73.77			65.33			82.79			67.48			65.55
Common equity tier 1 to risk-weighted assets(3)	13.47			13.57			13.32			12.46			12.15
Tier 1 capital to risk-weighted assets(3)	13.66			13.77			13.52			12.64			12.33
Total capital to risk-weighted assets(3)	15.68			15.81			16.44			15.45			15.16
Tier 1 leverage ratio(3)	11.70			11.47			11.08			10.93			10.70

__________________________

(1)PTPP earnings, PTPP ROAA, tangible book value per common share, ROATCE, and core efficiency ratio are either non-GAAP financial measures or use a non-GAAP contributor in the formula. For a reconciliation of these alternative financial measures to their most directly comparable GAAP measures, please see the last few pages of this release.

(2)Calculated by dividing noninterest expense by the sum of net interest income plus noninterest income.

(3)June 30, 2025, ratios are estimated and calculated at the Company level, which is subject to the capital adequacy requirements of the Federal Reserve Board.

9

Origin Bancorp, Inc.

Selected Year-To-Date Financial Data

(Unaudited)

	Six Months Ended June 30, 2025
(Dollars in thousands, except per share amounts)	2025			2024
Income statement and share amounts
Net interest income	$	160,595		$	147,213
Provision for credit losses	6,306			8,243
Noninterest income	16,970			39,720
Noninterest expense	124,051			123,095
Income before income tax expense	47,208			55,595
Income tax expense	10,150			11,974
Net income	$	37,058		$	43,621
PTPP earnings(1)	$	53,514		$	63,838
Basic earnings per common share	1.19			1.41
Diluted earnings per common share	1.18			1.40
Dividends declared per common share	0.30			0.30
Weighted average common shares outstanding - basic	31,199,151			31,011,930
Weighted average common shares outstanding - diluted	31,375,804			31,110,747
Performance metrics
Yield on LHFI	6.33		%	6.58		%
Yield on interest-earning assets	5.83			6.01
Cost of interest-bearing deposits	3.21			3.90
Cost of total deposits	2.49			3.04
NIM-FTE	3.52			3.18
ROAA (annualized)	0.77			0.88
PTPP ROAA (annualized)(1)	1.11			1.29
ROAE (annualized)	6.34			8.17
ROATCE (annualized)(1)	7.38			9.73
Efficiency ratio(2)	69.86			65.85
Core efficiency ratio(1)	69.29			65.40

____________________________

(1)PTPP earnings, PTPP ROAA, ROATCE, and core efficiency ratio are either non-GAAP financial measures or use a non-GAAP contributor in the formula. For a reconciliation of these alternative financial measures to their most directly comparable GAAP measures, please see the last few pages of this release.

(2)Calculated by dividing noninterest expense by the sum of net interest income plus noninterest income.

10

Origin Bancorp, Inc.

Consolidated Quarterly Statements of Income

(Unaudited)

	Three Months Ended
	June 30,  2025		March 31,  2025		December 31,  2024		September 30,  2024		June 30,  2024
Interest and dividend income	(Dollars in thousands, except per share amounts)
Interest and fees on loans	$	121,239	$	117,075	$	127,021	$	133,195	$	129,879
Investment securities-taxable	7,692		8,076		6,651		6,536		6,606
Investment securities-nontaxable	1,425		968		964		905		893
Interest and dividend income on assets held in other financial institutions	4,281		6,424		5,197		3,621		4,416
Total interest and dividend income	134,637		132,543		139,833		144,257		141,794
Interest expense
Interest-bearing deposits	50,152		51,779		59,511		67,051		65,469
FHLB advances and other borrowings	1,216		96		88		482		514
Subordinated indebtedness	1,133		2,209		1,885		1,920		1,921
Total interest expense	52,501		54,084		61,484		69,453		67,904
Net interest income	82,136		78,459		78,349		74,804		73,890
Provision (benefit) for credit losses	2,862		3,444		(5,398)		4,603		5,231
Net interest income after provision (benefit) for credit losses	79,274		75,015		83,747		70,201		68,659
Noninterest income
Insurance commission and fee income	6,661		7,927		5,441		6,928		6,665
Service charges and fees	4,927		4,716		4,801		4,664		4,862
Other fee income	2,809		2,301		2,152		2,114		2,404
Mortgage banking revenue	1,369		915		1,151		1,153		1,878
Swap fee income	1,435		533		116		106		44
(Loss) gain on sales of securities, net	(14,448)		—		(14,617)		221		—
Limited partnership investment (loss) income	(1,909)		(1,692)		(62)		375		68
Change in fair value of equity investments	—		—		—		—		5,188
Other income	524		902		688		428		1,356
Total noninterest income (loss)	1,368		15,602		(330)		15,989		22,465
Noninterest expense
Salaries and employee benefits	38,280		37,731		36,405		38,491		38,109
Occupancy and equipment, net	7,187		8,544		7,913		6,298		7,009
Data processing	3,432		2,957		3,414		3,470		3,468
Office and operations	3,337		2,972		2,883		2,984		3,072
Intangible asset amortization	1,768		1,761		1,800		1,905		2,137
Regulatory assessments	1,345		1,392		1,535		1,791		1,842
Advertising and marketing	1,158		1,133		1,929		1,449		1,328
Professional services	1,285		1,250		2,064		2,012		1,303
Electronic banking	1,359		1,354		1,377		1,308		1,238
Loan-related expenses	669		599		431		751		1,077
Franchise tax expense	688		675		884		721		815
Other expenses	1,475		1,700		4,787		1,341		2,990
Total noninterest expense	61,983		62,068		65,422		62,521		64,388
Income before income tax expense	18,659		28,549		17,995		23,669		26,736
Income tax expense	4,012		6,138		3,725		5,068		5,747
Net income	$	14,647	$	22,411	$	14,270	$	18,601	$	20,989

11

Origin Bancorp, Inc.

Consolidated Balance Sheets

(Unaudited)

(Dollars in thousands)	June 30,  2025		March 31,  2025		December 31,  2024		September 30,  2024		June 30,  2024
Assets
Cash and due from banks	$	113,918	$	112,888	$	132,991	$	159,337	$	137,615
Interest-bearing deposits in banks	220,193		373,314		337,258		161,854		150,435
Total cash and cash equivalents	334,111		486,202		470,249		321,191		288,050
Securities:
AFS	1,126,721		1,161,368		1,102,528		1,160,965		1,160,048
Held to maturity, net of allowance for credit losses	11,093		11,094		11,095		11,096		11,616
Securities carried at fair value through income	6,218		6,512		6,512		6,533		6,499
Total securities	1,144,032		1,178,974		1,120,135		1,178,594		1,178,163
Non-marketable equity securities held in other financial institutions	75,181		71,754		71,643		67,068		64,010
Loans held for sale	8,878		10,191		10,494		7,631		18,291
LHFI	7,684,446		7,585,526		7,573,713		7,956,790		7,959,171
Less: ALCL	92,426		92,011		91,060		95,989		100,865
LHFI, net of ALCL	7,592,020		7,493,515		7,482,653		7,860,801		7,858,306
Premises and equipment, net	122,618		123,847		126,620		126,751		121,562
Cash surrender value of bank-owned life insurance	41,265		41,021		40,840		40,602		40,365
Goodwill	128,679		128,679		128,679		128,679		128,679
Other intangible assets, net	36,444		38,212		37,473		39,272		41,177
Accrued interest receivable and other assets	194,930		177,977		189,916		195,397		208,579
Total assets	$	9,678,158	$	9,750,372	$	9,678,702	$	9,965,986	$	9,947,182
Liabilities and Stockholders’ Equity
Noninterest-bearing deposits	$	1,841,684	$	1,888,808	$	1,900,651	$	1,893,767	$	1,866,622
Interest-bearing deposits excluding brokered interest-bearing deposits, if any	5,450,710		5,536,636		5,301,243		5,137,940		4,984,817
Time deposits	805,642		862,968		941,000		1,023,252		1,022,589
Brokered deposits	25,000		50,000		80,226		431,609		636,814
Total deposits	8,123,036		8,338,412		8,223,120		8,486,568		8,510,842
FHLB advances and other borrowings	127,843		12,488		12,460		30,446		40,737
Subordinated indebtedness	89,657		89,599		159,943		159,861		159,779
Accrued expenses and other liabilities	131,853		129,696		137,934		143,438		139,930
Total liabilities	8,472,389		8,570,195		8,533,457		8,820,313		8,851,288
Stockholders’ equity:
Common stock	156,124		156,220		155,988		155,837		155,543
Additional paid-in capital	537,819		538,790		537,366		535,662		532,950
Retained earnings	585,387		575,578		557,920		548,419		534,585
Accumulated other comprehensive loss	(73,561)		(90,411)		(106,029)		(94,245)		(127,184)
Total stockholders’ equity	1,205,769		1,180,177		1,145,245		1,145,673		1,095,894
Total liabilities and stockholders’ equity	$	9,678,158	$	9,750,372	$	9,678,702	$	9,965,986	$	9,947,182

12

Origin Bancorp, Inc.

Loan Data

(Unaudited)

	At and For the Three Months Ended
	June 30,  2025		March 31,  2025		December 31,  2024		September 30,  2024		June 30,  2024
LHFI	(Dollars in thousands)
Owner occupied commercial real estate	$	972,788	$	937,985	$	975,947	$	991,671	$	959,850
Non-owner occupied commercial real estate	1,455,771		1,445,864		1,501,484		1,533,093		1,563,152
Construction/land/land development	653,748		798,609		864,011		991,545		1,017,389
Residential real estate - single family	1,465,535		1,465,192		1,432,129		1,414,013		1,421,027
Multi-family real estate	529,899		489,765		425,460		434,317		398,202
Total real estate loans	5,077,741		5,137,415		5,199,031		5,364,639		5,359,620
Commercial and industrial	2,011,178		2,022,085		2,002,634		2,074,037		2,070,947
MW LOC	574,748		404,131		349,081		495,188		506,505
Consumer	20,779		21,895		22,967		22,926		22,099
Total LHFI	7,684,446		7,585,526		7,573,713		7,956,790		7,959,171
Less: ALCL	92,426		92,011		91,060		95,989		100,865
LHFI, net	$	7,592,020	$	7,493,515	$	7,482,653	$	7,860,801	$	7,858,306
Nonperforming assets(1)
Nonperforming LHFI
Commercial real estate	$	12,814	$	5,465	$	4,974	$	2,776	$	2,196
Construction/land/land development	17,720		17,694		18,505		26,291		26,336
Residential real estate(2)	37,996		40,749		36,221		14,313		13,493
Commercial and industrial	16,655		17,325		15,120		20,486		33,608
Consumer	130		135		182		407		179
Total nonperforming LHFI	85,315		81,368		75,002		64,273		75,812
Other real estate owned/repossessed assets	1,991		1,990		3,635		6,043		6,827
Total nonperforming assets	$	87,306	$	83,358	$	78,637	$	70,316	$	82,639
Classified assets	$	129,628	$	129,666	$	122,417	$	113,529	$	125,081
Past due LHFI(3)	67,626		72,774		42,437		38,838		66,276
Past due 30 to 89 days and still accruing	12,495		42,587		18,015		20,170		17,080
Allowance for loan credit losses
Balance at beginning of period	$	92,011	$	91,060	$	95,989	$	100,865	$	98,375
Provision (benefit) for loan credit losses	2,715		3,679		(5,489)		4,644		5,436
Loans charged off	3,700		4,848		2,025		11,226		3,706
Loan recoveries	1,400		2,120		2,585		1,706		760
Net charge-offs (recoveries)	2,300		2,728		(560)		9,520		2,946
Balance at end of period	$	92,426	$	92,011	$	91,060	$	95,989	$	100,865

13

Origin Bancorp, Inc.

Loan Data - Continued

(Unaudited)

	At and For the Three Months Ended
	June 30,  2025		March 31,  2025		December 31,  2024		September 30,  2024		June 30,  2024
Credit quality ratios
Total nonperforming assets to total assets	0.90	%	0.85	%	0.81	%	0.71	%	0.83	%
Nonperforming LHFI to LHFI	1.11		1.07		0.99		0.81		0.95
Past due LHFI to LHFI	0.88		0.96		0.56		0.49		0.83
Past due 30 to 89 days and still accruing to LHFI	0.16		0.56		0.24		0.25		0.21
ALCL to nonperforming LHFI	108.33		113.08		121.41		149.35		133.05
ALCL to total LHFI	1.20		1.21		1.20		1.21		1.27
ALCL to total LHFI, adjusted(4)	1.29		1.28		1.25		1.28		1.34
Net charge-offs (recoveries) to total average LHFI (annualized)	0.12		0.15		(0.03)		0.48		0.15

____________________________

(1)Nonperforming assets consist of nonperforming/nonaccrual loans and property acquired through foreclosures or repossession, as well as bank-owned property not in use and listed for sale, if any.

(2)Includes multi-family real estate.

(3)Past due LHFI are defined as loans 30 days or more past due and includes past due nonperforming loans.

(4)The ALCL to total LHFI, adjusted is calculated by excluding the ALCL for MW LOC loans from the total LHFI ALCL in the numerator and excluding the MW LOC loans from the LHFI in the denominator. Due to their low-risk profile, MW LOC loans require a disproportionately low allocation of the ALCL.

14

Origin Bancorp, Inc.

Average Balances and Yields/Rates

(Unaudited)

	Three Months Ended
	June 30, 2025				March 31, 2025				June 30, 2024
	Average Balance		Yield/Rate		Average Balance		Yield/Rate		Average Balance		Yield/Rate
Assets	(Dollars in thousands)
Commercial real estate	$	2,407,632	5.78	%	$	2,448,099	5.82	%	$	2,497,490	5.91	%
Construction/land/land development	739,601		6.92		821,754		6.87		1,058,972		6.98
Residential real estate(1)	1,955,422		5.62		1,909,922		5.53		1,787,829		5.48
Commercial and industrial ("C&I")	2,068,175		7.30		2,004,034		7.37		2,128,486		7.87
MW LOC	480,587		6.86		289,521		7.07		430,885		7.57
Consumer	21,851		7.29		22,709		7.45		22,396		8.06
LHFI	7,673,268		6.33		7,496,039		6.33		7,926,058		6.58
Loans held for sale	11,422		6.92		8,590		6.18		14,702		6.84
Loans receivable	7,684,690		6.33		7,504,629		6.33		7,940,760		6.58
Investment securities-taxable	980,430		3.15		1,021,904		3.21		1,046,301		2.54
Investment securities-nontaxable	175,101		3.26		140,875		2.79		143,232		2.51
Non-marketable equity securities held in other financial institutions	77,240		6.63		71,669		2.35		56,270		6.53
Interest-earning balances due from banks	276,372		4.36		543,821		4.48		254,627		5.53
Total interest-earning assets	9,193,833		5.87		9,282,898		5.79		9,441,190		6.04
Noninterest-earning assets	522,090				525,317				567,035
Total assets	$	9,715,923			$	9,808,215			$	10,008,225
Liabilities and Stockholders’ Equity
Liabilities
Interest-bearing liabilities
Savings and interest-bearing transaction accounts	$	5,409,357	3.17	%	$	5,538,710	3.14	%	$	5,130,224	3.80	%
Time deposits	868,703		3.45		972,176		3.69		1,534,679		4.46
Total interest-bearing deposits	6,278,060		3.20		6,510,886		3.23		6,664,903		3.95
FHLB advances and other borrowings	111,951		4.36		14,148		2.75		41,666		4.96
Subordinated indebtedness	89,633		5.07		124,133		7.22		159,973		4.83
Total interest-bearing liabilities	6,479,644		3.25		6,649,167		3.30		6,866,542		3.98
Noninterest-bearing liabilities
Noninterest-bearing deposits	1,881,301				1,837,365				1,894,141
Other liabilities	164,647				154,934				163,273
Total liabilities	8,525,592				8,641,466				8,923,956
Stockholders’ Equity	1,190,331				1,166,749				1,084,269
Total liabilities and stockholders’ equity	$	9,715,923			$	9,808,215			$	10,008,225
Net interest spread			2.62	%			2.49	%			2.06	%
NIM			3.58				3.43				3.15
NIM-FTE(2)			3.61				3.44				3.17

____________________________

(1)Includes multi-family real estate.

(2)In order to present pre-tax income and resulting yields on tax-exempt investments comparable to those on taxable investments, a tax-equivalent adjustment has been computed. This adjustment also includes income tax credits received on Qualified School Construction Bonds.

15

Origin Bancorp, Inc.

Notable Items

(Unaudited)

	At and For the Three Months Ended
	June 30,  2025				March 31,  2025				December 31,  2024				September 30,  2024				June 30,  2024
	$ Impact		EPS Impact(1)		$ Impact		EPS Impact(1)		$ Impact		EPS Impact(1)		$ Impact		EPS Impact(1)		$ Impact		EPS Impact(1)
	(Dollars in thousands, except per share amounts)
Notable interest income items:
Interest income reversal on relationships impacted by questioned banker activity	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	—	$	(1,206)	$	(0.03)
Notable interest expense items:
OID amortization - subordinated debenture redemption	—		—		(681)		(0.02)		—		—		—		—		—		—
Notable provision expense items:
Provision release (expense) related to questioned banker activity	—		—		—		—		3,212		0.08		—		—		(3,212)		(0.08)
Provision release (expense) on relationships impacted by questioned banker activity	—		—		375		0.01		—		—		—		—		(4,131)		(0.11)
Notable noninterest income items(2):
(Loss) gain on sales of securities, net	(14,448)		(0.36)		—		—		(14,617)		(0.37)		221		0.01		—		—
Gain on sub-debt repurchase	—		—		—		—		—		—		—		—		81		—
Positive valuation adjustment on non-marketable equity securities	—		—		—		—		—		—		—		—		5,188		0.13
Net (loss) gain on OREO properties(2)	(158)		—		(212)		(0.01)		198		—		—		—		800		0.02
BOLI payout	—		—		208		0.01		—		—		—		—		—		—
Notable noninterest expense items:
Operating expense related to questioned banker activity	(530)		(0.01)		(543)		(0.01)		(4,069)		(0.10)		(848)		(0.02)		(1,452)		(0.04)
Operating expense related to strategic Optimize Origin initiatives	(428)		(0.01)		(1,615)		(0.04)		(1,121)		(0.03)		—		—		—		—
Employee Retention Credit	—		—		213		0.01		1,651		0.04		—		—		—		—
Total notable items	$	(15,564)	(0.39)		$	(2,255)	(0.06)		$	(14,746)	(0.37)		$	(627)	(0.02)		$	(3,932)	(0.10)

____________________________

(1)The diluted EPS impact is calculated using a 21% effective tax rate. The total of the diluted EPS impact of each individual line item may not equal the calculated diluted EPS impact on the total notable items due to rounding.

(2)The $158,000 net loss on OREO properties for the quarter ended June 30, 2025, includes an $8,000 insurance settlement recovery that was included in noninterest income on the face of the income statement and $3,000 in repair costs that was included in noninterest expense. The $212,000 net loss on OREO properties for the quarter ended March 31, 2025, includes a $444,000 expected insurance settlement recovery that was included in noninterest income on the face of the income statement, and a $148,000 repair cost that was included in noninterest expense.

16

Origin Bancorp, Inc.

Notable Items - Continued

(Unaudited)

	Six Months Ended June 30,
	2025				2024
	$ Impact		EPS Impact(1)		$ Impact		EPS Impact(1)
	(Dollars in thousands, except per share amounts)
Notable interest income items:
Interest income reversal on relationships impacted by questioned banker activity	$	—	$	—	$	(1,206)	$	(0.03)
Notable interest expense items:
OID amortization -subordinated debenture redemption	(681)		(0.02)		—		—
Notable provision expense items:
Provision expense related to questioned banker activity	—		—		(3,212)		(0.08)
Provision release (expense) on relationships impacted by questioned banker activity	375		0.01		(4,131)		(0.10)
Notable noninterest income items:
MSR gain (impairment)	—		—		410		0.01
Loss on sales of securities, net	(14,448)		(0.36)		(403)		(0.01)
Gain on sub-debt repurchase	—		—		81		—
Positive valuation adjustment on non-marketable equity securities	—		—		5,188		0.13
Net (loss) gain on OREO properties (2)	(370)		(0.01)		800		0.02
BOLI payout	208		0.01		—		—
Notable noninterest expense items:
Operating expense related to questioned banker activity	(1,073)		(0.03)		(1,452)		(0.04)
Operating expense related to strategic Optimize Origin initiatives	(2,043)		(0.05)		—		—
Employee Retention Credit	213		0.01		—		—
Total notable items	$	(17,819)	(0.45)		$	(3,925)	(0.10)

____________________________

(1)The diluted EPS impact is calculated using a 21% effective tax rate. The total of the diluted EPS impact of each individual line item may not equal the calculated diluted EPS impact on the total notable items due to rounding.

(2)The $370,000 net loss on OREO properties for the six months ended June 30, 2025, includes a $452,000 insurance settlement recovery that was included in noninterest income on the face of the income statement and a $151,000 repair cost that was included in noninterest expense.

17

Origin Bancorp, Inc.

Non-GAAP Financial Measures

(Unaudited)

	At and For the Three Months Ended
	June 30,  2025			March 31,  2025			December 31,  2024			September 30,  2024			June 30,  2024
	(Dollars in thousands, except per share amounts)
Calculation of PTPP earnings:
Net income	$	14,647		$	22,411		$	14,270		$	18,601		$	20,989
Provision (benefit) for credit losses	2,862			3,444			(5,398)			4,603			5,231
Income tax expense	4,012			6,138			3,725			5,068			5,747
PTPP earnings (non-GAAP)	$	21,521		$	31,993		$	12,597		$	28,272		$	31,967
Calculation of PTPP ROAA:
PTPP earnings	$	21,521		$	31,993		$	12,597		$	28,272		$	31,967
Divided by number of days in the quarter	91			90			92			92			91
Multiplied by the number of days in the year	365			365			366			366			366
PTPP earnings, annualized	$	86,320		$	129,749		$	50,114		$	112,473		128,571
Divided by total average assets	9,715,923			9,808,215			9,978,543			9,985,836			10,008,225
ROAA (annualized) (GAAP)	0.60		%	0.93		%	0.57		%	0.74		%	0.84		%
PTPP ROAA (annualized) (non-GAAP)	0.89			1.32			0.50			1.13			1.28
Calculation of tangible book value per common share:
Total common stockholders’ equity	$	1,205,769		$	1,180,177		$	1,145,245		$	1,145,673		$	1,095,894
Goodwill	(128,679)			(128,679)			(128,679)			(128,679)			(128,679)
Other intangible assets, net	(36,444)			(38,212)			(37,473)			(39,272)			(41,177)
Tangible common equity	1,040,646			1,013,286			979,093			977,722			926,038
Divided by common shares outstanding at the end of the period	31,224,718			31,244,006			31,197,574			31,167,410			31,108,667
Book value per common share (GAAP)	$	38.62		$	37.77		$	36.71		$	36.76		$	35.23
Tangible book value per common share (non-GAAP)	33.33			32.43			31.38			31.37			29.77
Calculation of ROATCE:
Net income	$	14,647		$	22,411		$	14,270		$	18,601		$	20,989
Divided by number of days in the quarter	91			90			92			92			91
Multiplied by number of days in the year	365			365			366			366			366
Annualized net income	$	58,749		$	90,889		$	56,770		$	74,000		$	84,417
Total average common stockholders’ equity	$	1,190,331		$	1,166,749		$	1,149,228		$	1,125,697		$	1,084,269
Average goodwill	(128,679)			(128,679)			(128,679)			(128,679)			(128,679)
Average other intangible assets, net	(37,459)			(38,254)			(38,646)			(40,487)			(42,563)
Average tangible common equity	1,024,193			999,816			981,903			956,531			913,027
ROAE (annualized) (GAAP)	4.94		%	7.79		%	4.94		%	6.57		%	7.79		%
ROATCE (annualized) (non-GAAP)	5.74			9.09			5.78			7.74			9.25

18

Origin Bancorp, Inc.

Non-GAAP Financial Measures- Continued

(Unaudited)

	At and For the Three Months Ended
	June 30,  2025			March 31,  2025			December 31,  2024			September 30,  2024			June 30,  2024
	(Dollars in thousands, except per share amounts)
Calculation of core efficiency ratio:
Total noninterest expense	$	61,983		$	62,068		$	65,422		$	62,521		$	64,388
Insurance and mortgage noninterest expense	(8,460)			(8,230)			(8,497)			(8,448)			(8,402)
Adjusted total noninterest expense	53,523			53,838			56,925			54,073			55,986
Net interest income	$	82,136		$	78,459		$	78,349		$	74,804		$	73,890
Insurance and mortgage net interest income	(2,924)			(2,815)			(2,666)			(2,578)			(2,407)
Total noninterest income	1,368			15,602			(330)			15,989			22,465
Insurance and mortgage noninterest income	(8,030)			(8,842)			(6,592)			(8,081)			(8,543)
Adjusted total revenue	72,550			82,404			68,761			80,134			85,405
Efficiency ratio (GAAP)	74.23		%	65.99		%	83.85		%	68.86		%	66.82		%
Core efficiency ratio (non-GAAP)	73.77			65.33			82.79			67.48			65.55

19

Origin Bancorp, Inc.

Non-GAAP Financial Measures - Continued

(Unaudited)

	Six Months Ended June 30,
	2025			2024
	(Dollars in thousands, except per share amounts)
Calculation of PTPP earnings:
Net income	$	37,058		$	43,621
Provision for credit losses	6,306			8,243
Income tax expense	10,150			11,974
PTPP earnings (non-GAAP)	$	53,514		$	63,838
Calculation of PTPP ROAA:
PTPP Earnings	$	53,514		$	63,838
Divided by the year-to-date number of days	181			182
Multiplied by number of days in the year	365			366
Annualized PTPP Earnings	$	107,915		$	128,378
Divided by total average assets	$	9,761,814		$	9,934,730
ROAA (annualized) (GAAP)	0.77		%	0.88		%
PTPP ROAA (annualized) (non-GAAP)	1.11			1.29
Calculation of ROATCE:
Net income	$	37,058		$	43,621
Divided by the year-to-date number of days	181			182
Multiplied by number of days in the year	365			366
Annualized net income	$	74,730		$	87,721
Total average common stockholders’ equity	$	1,178,605		$	1,073,487
Average goodwill	(128,679)			(128,679)
Average other intangible assets, net	(37,854)			(43,631)
Average tangible common equity	1,012,072			901,177
ROAE (annualized) (GAAP)	6.34		%	8.17		%
ROATCE (annualized) (non-GAAP)	7.38			9.73
Calculation of core efficiency ratio:
Total noninterest expense	$	124,051		$	123,095
Insurance and mortgage noninterest expense	(16,690)			(16,447)
Adjusted total noninterest expense	107,361			106,648
Net interest income	$	160,595		$	147,213
Insurance and mortgage net interest income	(5,739)			(5,202)
Total noninterest income	16,970			39,720
Insurance and mortgage noninterest income	(16,872)			(18,666)
Adjusted total revenue	154,954			163,065
Efficiency ratio (non-GAAP)	69.86		%	65.85		%
Core efficiency ratio (non-GAAP)	69.29			65.40

20